Car-truck.



D. C. MULVIHILL.

CAR TRUCK.

APPLICATION FILED MAR.27,1916.

1,1 88,8 1 2. Patent-ee June 27, 1916.

2 SHEETS-SHEET 1.

Tm: COLUMBIA PLANOGRAPH co., WASHINGTON, n. C.

D. C. MULVIHILL.

CAR TRUCK.

APPLICATIQN FILED MAR.27. 1916.

Patented June 27, 1916.

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CAR-TRUCK.

Application filed March 27, 1916.

To all whom it may concern:

Be it known that I, DANIEL C. MULVIHILL, a citizen of the United States, and a resident of Hannibal, county of Marian, and State of Missouri, have invented certain new and useful Improvements in Car-Trucks, of which the following is declared to be a. full, clear, and exact description.

This invention relates to car trucks, and its primary object is to simplify, clica-pen and otherwise improve upon the construction thereof.

Another object is to provide a truck wherein the side frames and bolster may be quickly and easily assembled and taken apart.

Another object is a rocking connection between the side frames and bolster, whereby the wheels may follow uneven portions in the rails without any undue strain on the bolster.

Another object is to provide cast metal side frames and a bolster of improved construction wherein the use of rivets or bolts is wholly dispensed with.

fith these and other objects in view, this invention consists in the several novel features hereinafter fully set forth and claimed.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1, is a plan of a car truck embodying a simple form of the present invention; Fig. 2, is a side elevation thereof; Fig. 3, is a detail, vertical section taken on line 3 3 Fig. 1; Fig. 4, is a detail, vertical section taken on line 4 4 Figs. 1 and 3; Fig. 5, is a perspective view of a fragment of the bolster, and Fig. 6 is an end view of one of the side frames looking in the direction of the arrow G, in Fig. 2. Figs. 3 to 6, inclusive, are upon a larger scale than Figs. 1 and 2.

Referring to said drawings, which illustrate a simple embodiment of the invention, 10 designates the bolster and 11, 11, the side frames of the truck. The bolster comprises a vertical web portion 12, and top and bottom horizontal flanges 13, 14. At the middle of the bolster is the center bearing member 15, which if desired, may be cast integral with the bolster. At both ends of the bolster are trunnion members 16, the upper faces of which are shown hat, and flush with the upper face of the flange 13; the lower bearing faces 17, of the trunnions being cylindrical in form and concentric with Specification of Letters latent.

Patented J une 27, 1916.

Serial No. 86,858.

each other. At the places where t-he trunnion members project from the remainder of the bolster, are vert-ical flanges or shoulders 18, which are slightly wider and deeper than the trunnions. Conveniently the trunnion members may be hollow and reinforced by vertical webs 19, and an end wall 20, may be provided at t-he extreme end of each trun nion member, which `wall extends down below the bearing face vof the trunnion member in the form of a flange 21, whose width at the top is the same as that of the trunnion.

All of the members of the bolster are or may be cast integral in one unit, whereby the use of rivets, bolts or the like are wholly dispensed with.

The side members 11, are alike in construction, and I will, therefore, describe one, it being understood that such description applies to both. Each side member comprises a vertical web 22, a top horizontal flange 23, and an inverted arch shaped bottom flange 24. At the ends of the side frame, and cast integral therewith, are the pedestals 25, 25, in which are removably secured the bearing boxes 2G. Each pedestal has vertical side members 27, 27, united at the bottom by a bottom member 23, and at the top of each pedestal is the spring` housing 29, which consists in a hollow enlargement, closed at the top by the flange 23, and open at the bottom; the springs 30, are interposed between the tops of the bearing boxes 26, and flange 23, at the tops of the spring housings. It is to be observed that the web 22, is carried around the sides and bottom of the pedestals as at 31, to reinforce and strengthen them. Each box has side flanges 32, that engage the edges of the side members 27, of the pedestals for positioning them.

At the middle of the side frame, the web 22, is very deep, and it is formed with an opening 33, of substantially the width of the trunnion member; the lower side of the opening is semicircular, and a semicircular flange 34, extends out from each side of the vertical web 22, at said' opening 33, to provide a semicylindrical bearing for the trunnion 16, on the bolster'. The semicircular flange 34, extends from the flange 18, of the bolster to the flange 21, of the trunnion and is continued up to the horizontal flange 23; ribs 35, extend between the flanges 34 and 24 to strengthen and reinforce the web 22.

To lighten the side frame, the web 22, may be formed with openings 36. The opening 33, is of a depth equal to or slightly less than the height of the end wall 20, including the flanOe 2l, there being enough clearance to permit the insertion of the trunnion through the hole 83, in assembling the truck. It is to be understood that the side frame is made of a single piece.

From the above description, it is apparent that there are three main parts to the truck, namely: the bolster and the two side frames, each being cast in one piece, whereby rivets, or bolts are wholly dispensed with. In assembling the parts, the trunnions of the bolster are inserted into the openings 33 of the side frames, and dropped upon the semicylindrical bearings thereof. The flanges 18, 21, prevent lateral movement of the side frames with respect to the bolster, and the long bearings prevent angular movement. rlhe side frames may, however, rock on the bolster, because of the pivotal bearing therebetween, thus the load is distributed equally on all four wheels regardless of track conditions, and thereby minimizing derailment.

It is to be noticed that with the use of a truck construction as above described spring channels, angles or other stays are omitted without sacrificing rigidity and strength. The spring housings over the journal box openings prevent tipping or leaning of the spring and canting of the journal boxes.

By reason of the closed bottom pedestals, a much stronger and substantial frame is obtained.

More or less variation of the exact details oit' construction is possible without departing from the spirit of this invention. I desire, therefore, not to limit myself to the exact form of the invention shown and described, but intend in the following claims to point out all of the invention disclosed herein.

I claim as new and desire to secure by Letters Patent,

l. A car truck, comprising side frames, each formed with a lcentrally located bearing aperture and bearing, and a truck bolster having a trunnion at each end rotatively seated in a bearing in a side frame, there being rigid flanges at the ends of each trunnion engaging with both sides of a side frame, and the trunnions and therewith the outer fixed flanges thereoil being insertible through the apertures of the side frames.

2. A car truck, comprising a truck bolster having trunnions at each end, and side frames formed with a bearing aperture for said trunnions, the bolster having rigid flanges at each end of each trunnion for preventing endwise movement of said bolster relative to the side frames, the outer rigid flanges being on the lower sides only of the trunnions, and the combined height of each trunnion and its outer flange being less than the height of a bearing aperture.

3. A car truck, comprising a single piece truck bolster, flat on its top and formed at its ends with semi-cylindrical trunnions, flat on their tops and flush with the to-p of the main body of the bolster, and single piece, side rames,each formed with a semicylindrical bearing, there being a bearing aperture above said bearing, the upper edge of which aperture is iiat, and the trunnions having inner and outer rigid flanges engaging the sides of the side frames for preventing endwise movement of said bolster with respect to the side frames; the trunnions and therewith the outer rigid flanges being .insertible through said bearing apertures for the purpose of assemblage.

l-. A car truck comprising a truck bolster, of I cross section and formed at its ends with integral hollow trunnions, and side frames of I` cross section, the vertical web of each being formed with a centrally located, semi-circular bearing aperture, adjacent which is a semi-circular flange forining a bearing for a trunnion; said trunnions being formed with inner and outer rigid flanges engaging the edges of said semi-circular flanges to prevent endwise movement of the bolster with respect to the side frames and the trunnion and outer rigid trunnion fianges being insertible through said bearing apertures.

DANIEL C. MULVIHILL.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C." 

